50621261 has 4 divisors (see below), whose sum is σ = 50648892. Its totient is φ = 50593632.

The previous prime is 50621251. The next prime is 50621267. The reversal of 50621261 is 16212605.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13032100 + 37589161 = 3610^2 + 6131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50621261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50621267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10856 + ... + 14801.

It is an arithmetic number, because the mean of its divisors is an integer number (12662223).

Almost surely, 2^50621261 is an apocalyptic number.

It is an amenable number.

50621261 is a deficient number, since it is larger than the sum of its proper divisors (27631).

50621261 is a wasteful number, since it uses less digits than its factorization.

50621261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27630.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 50621261 is about 7114.8619803901. The cubic root of 50621261 is about 369.9227036000.

Adding to 50621261 its reverse (16212605), we get a palindrome (66833866).

The spelling of 50621261 in words is "fifty million, six hundred twenty-one thousand, two hundred sixty-one".